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| | 3 | == Effective field theory for nTGC == |
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| | 5 | Author : Celine Degrande |
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| | 7 | References : |
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| | 9 | * C. Degrande, A basis of dimension-eight operators for anomalous neutral triple gauge boson interactions, to be published |
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| | 12 | == Description == |
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| | 14 | This !MadGraph5 model is the implementation of the dimension-eight operators inducing neutral triple gauge boson couplings (nTGC). Namely, the model contains all the four dimension-eight operators that modify the neutral triple gauge boson vertices. Their coefficients can be set in the param_card.dat. The parameters in the param_card are the full coefficients, i.e. $C_i/\Lambda^4$ and are in TeV$^-2$. The name are self-explanatory, $C_{\widetilde{B}W}/\Lambda^4$ is called CBtWL4, $C_{BW}/\Lambda^4$ is called CBWL4 and similarly for $C_WW$ and $C_BB$. The new interaction has also an order NP (for new physics) which is the power of ($1/\Lambda^4$) of the amplitude. |
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| | 16 | || '''Operator''' ||'''Coefficient'''|| '''param_card name''' || '''limit at 68% C.L.(TeV$^{-4}$)''' || |
| | 17 | ||'''$i H^\dagger \widetilde{B}_{\mu\nu}W^{\mu\rho}\{D_\rho,D^\nu\} H$'''|| '''$C_{\widetilde{B}W}/\Lambda42$''' || CBtWL4 || [-47 , 47] || |
| | 18 | ||'''$i H^\dagger B_{\mu\nu}W^{\mu\rho}\{D_\rho,D^\nu\} H$'''|| '''$C_{BW}/\Lambda42$''' || CBWL4 || [-386 , 394 ] || |
| | 19 | ||'''$i H^\dagger W_{\mu\nu}W^{\mu\rho}\{D_\rho,D^\nu\} H$'''|| '''$C_{WW}/\Lambda42$''' || CWWL4 || [-151 , 148] || |
| | 20 | ||'''$i H^\dagger B_{\mu\nu}B^{\mu\rho}\{D_\rho,D^\nu\} H$'''|| '''$C_{BB}/\Lambda42$''' || CBBL4 || [-231 , 228] || |
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| | 22 | The limits have been obtained by inverting the values of the anomalous couplings from the PDG 2012 and JHEP 1301 (2013) 063. |
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